Hi Andreas,
Sorry everyone ... the issue was to do with the negative value at the top of the graph and the fact that the graph does not change despite the log partition filling up.
-rw-rw-rw- 1 root root 88 Mar 29 12:01 /etc/initial_usage_correction
James, the df of your log partition says the same like the graph does - usage of 264MB on a 40gig partition won't be noticeable much. So as far as I can see, the graph is OK.
As to the negative fillup estimation: I think that at the point where the initial usage correction was determined the log partition usage was higher than it was now, therefore leading to a negative estimation.
Can you please verify this by checking the contents of the initial usage correction file with this command?
perl -e 'use Storable; use Data:[:D]umper; my $data = retrieve("/etc/initial_usage_correction"); print Dumper($data); '
This file contains the initial partition usage in blocks, which is used as a baseline when computing the fillup rate. It is usually created right after installation.
